Method for reducing sag in drilling, completion and workover...

Details Method for reducing sag in drilling, completion and workover... Method for reducing sag in drilling, completion and workover...

C - Chemistry, Metallurgy

09

K

C09K 8/32 (2006.01) C09K 8/36 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2488090

A method is disclosed for reducing sag in drilling and completion fluids and in workover fluids. The method employs a drilling fluid comprising a low molecular weight polyalkyl methacrylate with an average molecular weight ranging from about 40,000 to about 90,000. This additive does not result in enhanced viscosity of the fluid.

L'invention concerne un procédé permettant de réduire la coulure dans des fluides de forage et de complétion, et dans des fluides de reconditionnement. Ledit procédé fait appel à un fluide de forage contenant un méthacrylate de polyalkyle à faible masse moléculaire, dont la masse moléculaire moyenne est comprise entre environ 40 000 et environ 90 000. Cet additif n'a pas pour effet d'augmenter la viscosité du fluide.

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